32 BULLETIN 281, U. S. DEPARTMENT OF AGEICULTUEE. 
4. On a plat of tomatoes (one-tenth of an acre) the rental was $2. labor $4.50, staking 
and pruning $2, fertilizer $2.50, harvesting $2. One hundred dozen cans at 36 cents 
a dozen were used. The canner cost $5 and the cost of labor for canning was $10. 
The output of 1,200 cans sold at 8 cents a can. Find cost of production, total cost in 
cans, profit, percentage of profit based on investment, and profit per can. 
5. A round silo has an inside diameter of 14 feet and is filled to the height of 32 
feet. Find volume in cubic feet and weight of silage in tons if each cubic foot weighs 
38 pounds. How many days' feed will it hold at 35 pounds a day for each cow, and 
how many cows will it feed for 180 days? 
1. The floor plan of a club member's poultry house measures 20 feet long by 14 
feet wide. Deduct 112 square feet for equipment and find the floor space per hen 
for a flock of 32. 
2. This same house has a shed roof and stands 8 feet high in front and 5 feet at the 
rear. Compute the area of each side and end, also of the roof, allowing an extension 
of 1 foot on front and back over the walls. Compute boards for sides, roof, and floor, 
add one-half to cover the frame timber, and then make out a bill at the local prices. 
3. Similar problems may be arranged concerning a hog house whenever pig-club 
members are in the class. 
4. On a club acre 6,125 pounds of ear corn is harvested which has 18 per cent to be 
deducted. Compute bushels of ear corn, 70 pounds a bushel. When shelled each 
bushel weighs 56 pounds, what percentage of the ear corn is cob? Find value of this 
yield at 68 cents a bushel. 
5. Farmers' Bui. 409, page 11, states that when $10 worth of corn is sold off the 
farm $3.78 worth of fertilizer is sold, but in selling $10 worth of beef cattle only $1.18 
worth of fertilizer is sold. Compute the saving by turning the corn crop of problem 
4 into beef, allowing for no other change of values. 
6. In one feeding experiment it took 6 pounds of corn to produce 1 pound gain of 
pork. At the present market prices would this pay? What percentage of gain or 
loss if the corn were bought? 
NOVEMBER. 
1. A pen of 25 hens costing 55 cents each lay an average of 117 eggs a year, valued at 
19 cents a dozen. Care and feed costs 21 cents per month each hen. Find net profit 
for the flock, allowing 50 cents for meat value of each hen at the end of the year. 
2. By substituting pure-bred hens at $1 each and increasing the feed cost 6 cents each 
per month, 186 eggs per hen were obtained, averaging 28 cents a dozen. Find the 
total gain and the percentage profit on added investment over problem 1. 
3. A pupil sets an orchard of apple trees on a square acre, trees to be set 2 rods apart 
each way and none to be nearer than 1 rod to either boundary. Find cost if trees sell 
at s22 a hundred and labor is 9 cents a tree. 
4. An older orchard of the same area is sprayed with lime-sulphur in November for 
San Jose scale at a cost of 28 cents a tree. The apparent gain next fall is an increase 
of 45 bushels of marketable fruit at $4.50 a barrel. Find net gain due to spraying. 
5. A mixture of 200 pounds of cracked corn, 360 pounds of wheat, 130 pounds of oats, 
is fed to a flock of 35 hens at the rate of 4 pounds a day. At local prices compute cost 
per hen per day for this scratch feed. 
DECEMBER. 
1. While judging corn count the kernels on each row of the best ear found. If by 
improvement one kernel could be added to each row, what percentage of increase 
would this eive? 
